Originally Posted by
turbidus
New aircraft are shielded/tested to see if there are vulnerabilities with PED's. Kindof a snapshot in time, given 3G,4G, 5G, etc.
Airlines can have older aircraft tested, but why bother.
Anything built in the last 30 years has some level of HIRF protection (the requirements have evolved over time and are more defined and stringent on the newer stuff).
However, weird things still happen. There have been documented cases where the pilots experienced some flight deck anomalies and ask the FA to check who was using a PED and have them turn everything off - at which time everything returned to normal. What's really interesting is that they can never duplicate it later on - Boeing has gone as far as to purchase the actual PEDs from the passengers and test them and found nothing unusual.